Ralf Gitzel - Academia.edu (original) (raw)
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Graduate Center of the City University of New York
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Papers by Ralf Gitzel
In this paper we present a reliability case study conducted at a paper mill. The study's goal... more In this paper we present a reliability case study conducted at a paper mill. The study's goal was to identify whether mathematical models found in the literature can be used to predict expected future failure behavior. A special focus was on imperfect repair, which was considered a major cost driver at the case study site. Basis for the analysis was repair data found in the local Computerized Maintenance Management System (CMMS). In particular, the so-called Kijima II method was analyzed and the data compared to the local expert expectations. The paper discusses the results of these experiments and tries to explain the results. Great care is taken to identify under which circumstances the findings can be applied to other sites and other industries.
Science of Computer Programming, 2007
A lot of research is currently conducted in the field of Model-Driven Development (MDD), especial... more A lot of research is currently conducted in the field of Model-Driven Development (MDD), especially regarding its applications to specific domains. Another field that enjoys a great amount of popularity is the Web. As a result, one of the domains MDD is applied to quite frequently is that of Web Applications. However, Web Engineering differs significantly from general Software Engineering and a number of well-established non-MDD solutions already exist in that field. This leads to several interesting questions, which have been left unanswered so far. In this paper, we address this shortcoming by analyzing whether the problems encountered in the field of Web Engineering can really be solved with MDD approaches. We also answer the questions whether MDD will be able to solve these problems better and/or cheaper than traditional Web Engineering approaches and whether the current Web MDD propositions live up to this potential. While answering these questions, we will show that there exists a great synergy between the two groups and that the success of MDD in the Web domain will depend on exploiting the strengths of both.
Science of Computer Programming, 2011
We are happy to say that we have managed to increase the numbers of submissions and participants ... more We are happy to say that we have managed to increase the numbers of submissions and participants over the years. We have also, with the help of our excellent local organizers, managed to maintain or even increase the quality of our program. So, we were again able to select several fine papers to present to a wider audience as a special issue of the Science of Computer Programming: • The power of Java to embed Domain Specific Languages is demonstrated by the paper ''On Designing Safe and Flexible Embedded DSLs with Java 5'', which reports also on practical experiences. • To increase the flexibility of Java programming, the paper ''Delegation by Object Composition'' introduces 'incomplete' objects-these are objects with missing methods which will be provided at runtime by composed 'complete' objects.
… of the 6th International Conference on …, 2010
... Although constructing fault trees requires manual work, we consider them a valuable tool as t... more ... Although constructing fault trees requires manual work, we consider them a valuable tool as they offer an intuitive graph-ical view of the different factors that have to concur in order to trigger a software ... Modeling bug report quality ... Techniques for evaluating fault prediction models ...
2013 IEEE 15th Conference on Business Informatics, 2013
ABSTRACT Companies and their customers are increasingly looking for new solutions to streamline a... more ABSTRACT Companies and their customers are increasingly looking for new solutions to streamline and improve their operations. Maintenance, which can account for in between 15 - 70% of production costs is a key area of improvement in many industries. 'When the equipment will fail' and 'due to what type of failures' are critical information toward achieving effective and efficient maintenance operations. In this contribution we develop a product-service solution offering to support customers improving their maintenance activities. We identify the technical and organizational enablers and describe a use case example from the power industry.
In this paper we present a reliability case study conducted at a paper mill. The study's goal... more In this paper we present a reliability case study conducted at a paper mill. The study's goal was to identify whether mathematical models found in the literature can be used to predict expected future failure behavior. A special focus was on imperfect repair, which was considered a major cost driver at the case study site. Basis for the analysis was repair data found in the local Computerized Maintenance Management System (CMMS). In particular, the so-called Kijima II method was analyzed and the data compared to the local expert expectations. The paper discusses the results of these experiments and tries to explain the results. Great care is taken to identify under which circumstances the findings can be applied to other sites and other industries.
Science of Computer Programming, 2007
A lot of research is currently conducted in the field of Model-Driven Development (MDD), especial... more A lot of research is currently conducted in the field of Model-Driven Development (MDD), especially regarding its applications to specific domains. Another field that enjoys a great amount of popularity is the Web. As a result, one of the domains MDD is applied to quite frequently is that of Web Applications. However, Web Engineering differs significantly from general Software Engineering and a number of well-established non-MDD solutions already exist in that field. This leads to several interesting questions, which have been left unanswered so far. In this paper, we address this shortcoming by analyzing whether the problems encountered in the field of Web Engineering can really be solved with MDD approaches. We also answer the questions whether MDD will be able to solve these problems better and/or cheaper than traditional Web Engineering approaches and whether the current Web MDD propositions live up to this potential. While answering these questions, we will show that there exists a great synergy between the two groups and that the success of MDD in the Web domain will depend on exploiting the strengths of both.
Science of Computer Programming, 2011
We are happy to say that we have managed to increase the numbers of submissions and participants ... more We are happy to say that we have managed to increase the numbers of submissions and participants over the years. We have also, with the help of our excellent local organizers, managed to maintain or even increase the quality of our program. So, we were again able to select several fine papers to present to a wider audience as a special issue of the Science of Computer Programming: • The power of Java to embed Domain Specific Languages is demonstrated by the paper ''On Designing Safe and Flexible Embedded DSLs with Java 5'', which reports also on practical experiences. • To increase the flexibility of Java programming, the paper ''Delegation by Object Composition'' introduces 'incomplete' objects-these are objects with missing methods which will be provided at runtime by composed 'complete' objects.
… of the 6th International Conference on …, 2010
... Although constructing fault trees requires manual work, we consider them a valuable tool as t... more ... Although constructing fault trees requires manual work, we consider them a valuable tool as they offer an intuitive graph-ical view of the different factors that have to concur in order to trigger a software ... Modeling bug report quality ... Techniques for evaluating fault prediction models ...
2013 IEEE 15th Conference on Business Informatics, 2013
ABSTRACT Companies and their customers are increasingly looking for new solutions to streamline a... more ABSTRACT Companies and their customers are increasingly looking for new solutions to streamline and improve their operations. Maintenance, which can account for in between 15 - 70% of production costs is a key area of improvement in many industries. 'When the equipment will fail' and 'due to what type of failures' are critical information toward achieving effective and efficient maintenance operations. In this contribution we develop a product-service solution offering to support customers improving their maintenance activities. We identify the technical and organizational enablers and describe a use case example from the power industry.